NOVEL HYBRID SOLAR-CELLS CONSISTING OF INORGANIC NANOPARTICLES AND ANORGANIC HOLE TRANSPORT MATERIAL

A novel three-layer concept for efficient solid-state solar cells is p resented. The hybrid devices consist of an inorganic nanocrystalline t itanium dioxide layer for electron conduction, a surface-adsorbed ruth enium dye complex for light absorption, and an organic triphenyldiamin e layer for the transport of holes. External quantum efficiencies of u p to 0.2% have been achieved. Time-resolved current measurements with pulsed excitation of the dye layer reveal the charge transport to be t otally controlled by the nanoparticles in the long-time regime. The hi gh charge storage capability of the porous titanium dioxide layers is demonstrated by junction-recovery measurements. (C) 1997 Elsevier Scie nce S.A.